<template>
  <div class="rank" ref="rank">
    <scroll :data="topList" class="toplist" ref="toplist">
      <ul>
        <li @click="selectItem(item)" class="item" v-for="item in topList">
          <div class="icon">
            <img width="100" height="100" v-lazy="item.picUrl" />
          </div>
          <ul class="songlist">
            <li class="song" v-for="(song,index) in item.songList">
              <span>{{index + 1}}</span>
              <span>{{song.songname}}-{{song.singername}}</span>
            </li>
          </ul>
        </li>
      </ul>
      <div class="loading-container" v-show="!topList.length">
        <loading></loading>
      </div>
    </scroll>
    <router-view></router-view>
  </div>
</template>

<script>
import Scroll from 'base/scroll/scroll'
import Loading from 'base/loading/loading'
import { getTopList } from 'api/rank'
import { ERR_OK } from 'api/config'
import { playlistMixin } from 'common/js/mixin'
import { mapMutations } from 'vuex'

export default {
  mixins: [playlistMixin],
  components: {
    Scroll,
    Loading
  },
  data() {
    return {
      topList: []
    }
  },
  watch: {
    topList() {
      setTimeout(() => {
        this.$Lazyload.lazyLoadHandler()
      }, 20)
    }
  },
  created() {
    this._getTopList()
  },
  methods: {
    handlePlaylist(playlist) {
      const bottom = playlist.length > 0 ? '60px' : ''

      this.$refs.rank.style.bottom = bottom
      this.$refs.toplist.refresh()
    },
    _getTopList() {
      getTopList().then((res) => {
        if (res.code === ERR_OK) {
          this.topList = res.data.topList
        }
      })
    },
    selectItem(item) {
      this.$router.push({
        path: `/rank/${item.id}`
      })
      this.setTopList(item)
    },
    ...mapMutations({
      setTopList: 'SET_TOP_LIST'
    })
  }
}
</script>

<style lang="stylus" scoped>
  @import "~common/stylus/variable"
  @import "~common/stylus/mixin"

  .rank
    position fixed
    width 100%
    top 88px
    bottom 0
    .toplist
      height 100%
      overflow hidden
      .item
        display flex
        margin 0 20px
        padding-top 20px
        height 100px
        &:last-child
          padding-bottom 20px
        .icon
          flex 0 0 100px
          width 100px
          height 100px
        .songlist
          flex 1
          display flex
          flex-direction column
          justify-content center
          padding 0 20px
          height 100px
          overflow hidden
          background $color-highlight-background
          color $color-text-d
          font-size $font-size-small
          .song
            no-wrap()
            line-height 26px
      .loading-container
        position absolute
        width 100%
        top 50%
        transform translateY(-50%)
</style>
